The present invention relates to a structure of a street tree protection holder. To this end, a fixation nut is formed at a rear portion of a support member, a male screw part is formed to be fixated to the fixation nut, and a fixation projection-protruding rod member is formed at a terminal end. An elastic member, a main body, and an operation hole sequentially touch each other between the fixation nut and the male screw part. On the main body, a support part is provided on the outside, a first through-hole (32-1) is formed on an inner diameter, and the operation hole is formed on a main surface of the first through-hole. On the operation hole, a hanging projection is formed on an inner diameter, a second through-hole is formed on the outside of the hanging projection, and a hanging part is provided at a terminal main surface of the second through-hole. The rod member is formed by touching a stopping projection-formed stopping member.COPYRIGHT KIPO 2018볼 발명은 지지부재의 후방부에는 고정 너트가 형성되며, 고정너트에 고정할 수 있도록 숫나사부가 형성되고 말단에는 고정턱이 돌출되어 구비된 로드 부재가 형성되며,고정 너트와 숫나사부 사이에 탄성 부재와 본체 및 작동구가 순차적으로 면접되며,본체는 외측에 지지부가 구비되며, 내경에는 제 1 관통공(32-1)이 형성되며, 제 1 관통공의 주면에는 작동구가 안착되며,작동구는 내경에 걸림턱이 형성되며, 걸림턱 외측에는 제 2 관통공이 형성되고, 제 2 관통공의 말단 주면에는 걸림부가 구비되며, 상기한 로드 부재는 멈춤턱이 형성된 멈춤 부재가 면접되어 이루어져 있다.
